Benthic megafauna of the nearshore zone of Martel Inlet (King George Island, South Shetland Islands, Antarctica): Depth zonation and underwater observations

Benthic megafauna of the nearshore zone of Martel Inlet (King George Island, South Shetland Islands, Antarctica): Depth zonation and underwater observations

Autor Nonato, E. F. Google Scholar
Brito, TAS Google Scholar
De Paiva, P. C. Google Scholar
Petti, MAV Google Scholar
Corbisier, T. N. Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
CNPq
Universidade Federal do Rio de Janeiro (UFRJ)
Resumo The benthic megafauna from the soft bottoms of the shallow coastal zone of Martel Inlet (Admiralty Bay, King George Island, South Shetland Islands, Antarctica) was studied during three austral summers (1989/1990, 1990/1991 and 1994/1995) in relation to the bathymetric features. Surveying and sampling, based on specimen counting and underwater observations, were undertaken by scuba-diving at depths down to 25 m. the depth zonation appears to be influenced by the nature of the substrate and especially by the action of the ice. the multiple action of ice flows prevents the occurrence of sessile forms in the shallower areas, where a low-diversity community, dominated by motile animals, was found. in the area around Is m in depth, the action of icebergs generated faunistic and sedimentary patches of impacted and non-impacted areas. the more stable conditions prevailing below depths of 20-25 m allowed the establishment of a more diversified epifauna, including many sessile forms. the interannual differences observed in the densities of the mobile isopod Serolis polita may be associated with the summer period when the sampling was undertaken.
Idioma Inglês
Data de publicação 2000-08-01
Publicado em Polar Biology. New York: Springer-verlag, v. 23, n. 8, p. 580-588, 2000.
ISSN 0722-4060 (Sherpa/Romeo, fator de impacto)
Publicador Springer
Extensão 580-588
Fonte http://dx.doi.org/10.1007/s003000000129
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000088707400011
Endereço permanente http://repositorio.unifesp.br/handle/11600/26349

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